Question

Make a complete graph of the following function f(x)=x+2cosx on [-2pi,2pi]

Answer 1

The first thing i've done was take the first and second derivative

Answer 2

for the f ' (x)=1-2sinx

Answer 3

for f " (x)=-cosx

Answer 4

http://www.wolframalpha.com/widget/widgetPopup.jsp?p=v&id=bafd4215ef527cf0e0b2f843ce2ee763&title=&theme=&i0=x%2B2cosx&i1=-2pi&i2=2pi&i3=&i4=&podSelect=

Answer 5

that's what it might look like after all your steps